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Silver 3.5 inch internal hard drive with SATA connectors and label showing 14TB capacity

Western Digital

Western Digital WD140EFFX 14TB 5400 RPM 512MB Cache 3.5" SATA internal hard drive

SKU CH-6HYV-E5Y4V MPN WD140EFFX

14 TB 3.5-inch SATA drive with 5400 RPM, 512 MB cache and 180 TB/yr workload rating for NAS enclosures up to eight bays

  • Total capacity14 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Flash memory typeHard Drive
  • Rotational speed5,400 RPM
  • Cache memory512 MB

Capacity 14TB

Show 4 more
  • 14TB capacity for large NAS storage
  • 180TB yearly workload rating for heavy use
  • CMR technology with 512MB cache for consistent writes
  • NASware firmware ensures 8-bay compatibility
  • 5400RPM SATA 6.0Gb/s interface for 24x7 operation

14TB NAS Hard Drive for Small Business

The WD Red Plus WD140EFFX is a 14TB 3.5-inch internal hard drive built for network-attached storage. It spins at 5400 RPM with a 512MB cache and connects via a SATA 6.0Gb/s interface. The drive is designed for continuous 24x7 operation in small or medium business NAS enclosures.

CMR Technology and NASware Firmware

Conventional magnetic recording provides consistent write performance across the full 14TB capacity. NASware firmware optimises drive behaviour for multi-bay NAS systems, improving compatibility and reducing errors during rebuilds or heavy concurrent access. The drive supports up to eight drive bays and a workload rate of 180 TB per year.

Suited for Multi-Bay NAS Builds.

This drive fits NAS appliances that need high-capacity, always-on storage for backups, media libraries or shared files. It is not intended for use as a primary operating-system drive in a desktop PC, nor for workloads exceeding the 180 TB/yr rating. Builders needing faster random access or a smaller form factor should consider other storage types.

How it compares

Measured against everything we stock in 3.5-Inch Internal Desktop HDDs, at today’s prices. Recalculated every night.

Price $247.99
Pricier than about 76% of the 4,938 comparable items (median $107.99).
Total capacity 14 TB
Higher than about 91% of the 2,372 comparable items (median 2 TB).
Price per TB $17.71 per TB
Cheaper than about 94% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameWD
Product lineRed Plus
Model nameWD140EFFX
Total capacity14 TB
Recommended useFor NAS systems
Performance
Rotational speed5,400 RPM
Storage
Flash memory typeHard Drive
Cache memory512 MB
Ports & slots
Interface typeSATA 6.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Max height26.1 mm
Maximum width101.6 mm
Maximum length147 mm
Shipping weight0.80 kg
Package size229 × 155 × 81 mm

Other versions of this model

5 more in the same range

Questions about this item

Will the 512MB cache need any firmware updates or replacement over the 180 TB/yr workload rating?

The 512MB cache is a fixed hardware buffer on the WD140EFFX and does not require firmware updates or replacement; the drive is rated for 180 TB per year under the 24x7 NAS workload spec.

What limit appears first during sustained writes — the 5400 RPM spindle speed or the SATA 6.0Gb/s interface?

The 5400 RPM spindle speed sets the sustained throughput ceiling; the SATA 6.0Gb/s link on the WD140EFFX provides more bandwidth than the mechanical media can deliver.

How much noise and heat does the 3.5" 14TB helium-sealed drive produce in a 24x7 NAS?

The WD140EFFX is built for 24x7 operation in up to 8-bay NAS enclosures; its helium-filled design keeps acoustic and thermal output within the limits expected for a 5400 RPM class drive.

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